xstr debug filter #3170

Job	Run time
Mac (Debug, clang, x86_64)	14m 40s
Windows (Debug, MSVC, Win32)	13m 59s
Linux (Debug, gcc-5)	9m 21s
Mac (Release, clang, x86_64)	13m 40s
Windows (Debug, MSVC, x64)	18m 52s
Windows (Release, MSVC, Win32)	24m 20s
Linux (Debug, gcc-10)	12m 8s
Windows (Release, MSVC, x64)	26m 34s
Linux (Debug, clang-9)	15m 9s
Linux (Release, gcc-5)	7m 27s
Linux (Release, gcc-10)	9m 53s
Linux (Release, clang-9)	12m 26s
Linux (Debug, gcc-10, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	9m 59s
Linux (Release, gcc-10, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	8m 9s
	3h 16m 37s

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